The styer SSG 69 's bolt knob has broken. M8 female screw has been cut ABS product, but there is no stock in the country. When cutting out from Duracon it is an estimate of 15000 ~ 20000 yen. I searched for a substitute item.
It fits well. You can not tell the original from erasing gloss with paper

It is an inexpensive Chinese made milling machine, but replacing the shipping ball at the time of shipment with this product, the operability has improved dramatically! The shape of a teardrop shape is familiar well to the palm, and finger hooking is also very good.